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Ruby Proc curry化

2011/1/2 10:31:01 fuliang http://fuliang.javaeye.com 我要评论(0)

摘要：Ruby1.9Proc增加了curry方法，可以将Proc进行curry化：greeting_func=lambda{|name,greeting|puts"#{greeting}#{name}"}.curryhappy_greeting=greeting_func["Happy"]happy_greeting["Newyear"]hello_greeting=greeting_func["Hello"]hello_greeting["world"]结合1
标签：Ruby

Ruby 1.9 Proc增加了curry方法，可以将Proc进行curry化：

greeting_func = lambda { |name,greeting| puts "#{greeting} #{name}" }.curry
happy_greeting = greeting_func["Happy"]
happy_greeting["New year"]

hello_greeting = greeting_func["Hello"]
hello_greeting["world"]

结合1.9的Proc#===作为call的alias:

weekday = lambda {|day_of_week, time| day_of_week == time.wday}.curry
sunday,monday,tuesday,wednesday,thursday,friday,saturday = (0..6).collect{|i| weekday[i]}

case Time.now
when sunday,saturday
    puts "Day of rest"
when monday,tuesday,wednesday,thursday,friday,saturday
    puts "Day of work"
end

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